Dock insert



FIG. 1 is a top rear perspective view of a dock insert showing our new design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is right side view thereof,

FIG. 7 is a top pan view thereof; and,

FIG. 8 is a bottom pan view thereof. 

The ornamental design for a dock insert, as shown and described. 